Micro Bio questions: (5 total points) 1. Acinetobacter produces what scent on a

Question

Micro Bio

questions: (5 total points) 1. Acinetobacter produces what scent on a blood agar plate? 2. Leukocidins are produced by Staph. aureus. What do they do? 3. Strep Group A produces what kind of hemolysis? 4. Name a reservoir for the Edwardsielleae. I gave several examples in class, which may explain why infections from this group of bacteria may occur after aquatic accidents. 5. When testing for the presence of beta lactamase, by using the broth method, what would a positive (beta lactamase present) result look like?

Explanation / Answer

Acinetobacter produces Smells like dirty gym socks or a gym locker on a blood agar plate.

Leukocidins are cytotoxins produced by Staphylococcus aureus that causes leukocyte destruction and tissue necrosis.

Streptococcus Group A produces beta hemolysis (a complete lysis of red cells in the media around and under the colonies).

Edwardsiella survives upto 8 days in sterile pond water (reservoir)

Development of red color in the broth shows the presence of beta-lactamase.

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